Dust-collector



No. 750,342. PATENTED JAN. 26, 1904.

A. G. BRANTINGHAM- DUST GOLLEGTOR.

V APPLICATION FILED APR. a. 1903. N0 110mm. a SHEBTS-SHEET 1.

. Qvwewboz ewwwmo Allen C.Bra.ntingham,.

THE npRms FETERS co swam-mun WASNINGTON, a. c.

PATENTED JAN. 26, 1904.

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A. c. BRANTINGHAM.

DUST COLLECTOR.

. APPLICATION FILED APR. 8, 1903.

N0 MODEL.

wmmea v PATENTED JAN. 26; I904. A. c. BRANTINGHAM. V

DUST COLLECTOR. APPLICATION FILED APR. 8, 1903.

N0 MODEL.

3 SHEETS-SHEET 3- 2 a m e a 2 m w .w Q M 5 f 5 6 A. m 5 0 w Allen C.Bra.ntingha.m,

THE Moms PETERS co. Pnmau'ma. WASHINGTON. u. c.

Patented January 26, 1904.

UNITED STATES PATENT OFFICE.

ALLEN O. BRANTI NGHAM, OF TOLEDO, OHIO.

DUST-COLLECTOR.

SPECIFICATION forming part of Letters Patent No. 750,342, dated January 26, 1904.

A li ati fil d April 8, 1903. Serial No. 151,599. (No model.)

To all whom, it may concern.-

Be it known that I, ALLEN O. BRANTINGHAM, a citizen of the United States, residing at T0- ledo, in the county of Lucas and'State of Ohio, have invented certain new and useful Improvements in Dust-Collectors, of which the following is a specification.

The object of my present invention is to provide an effective means for dislodging the accumulated dust on the sieves of rotary dustcollectors which shall be automatic and continuous in operation. Its leading features, generally speaking, consist of a continuously reciprocally traveling head carried upon the shaft of the rotary dust-collector, intermit tingly-operated whipping-fingers carried by said head, and means for automatically advancing the structure from section to section of the dust-collector as the latter revolves.

Referring to the accompanying drawings, which are made a part hereof and on which similar reference characters indicate similar parts, Figure 1 is a View, partly in front elevation and partly in central longitudinal vertical section, of a dust-collector embodying my said invention; Fig. 2, a view, partly in end elevation and partly in transverse vertical central section, of the same; Fig. 3, an elevation of the dust-dislodging mechanism and immediately adjacent parts separately, on an enlarged scale; Fig. t, a similar view, except that one set of the dislodging devices and im mediately adjacent parts are shown in section; Fig. 5, a central vertical sectional view as seen from dotted line 5 5 in Figs. 3 and 4; Fig. 6,

a top or plan view as seen when looking downv wardly from the dotted line 6 6 above Fig. 3; Fig. 7, a detail viewas seen when looking downwardly from the dotted line 7 7 in Fig.

1, and Fig. 8- a detail end elevation illustrating the spring-catch more plainly.

The dust-collector in question is of the type i which embodies a suitable framework and cas- 1ng, within WlllCh 1s revolving structure embodying sultable frames over WhICll filtering .or screen cloth is secured, thus forming a series of pockets or chambers into which the dust-laden air is drawn, the dust being intercepted by the cloth, while the air passes through and is discharged beyond it. As the present invention does notrelate to any particular construction .of dust-collector, such construction will not be further described herein, except incidentallyin describing the invention. Suffice it to say (for the present) that the dust-collector should be rotatably mounted and have a horizontal shaft and that the dust-collecting pockets or chambers are generally and most conveniently substantially triangular in cross-section, the sides thereof being most conveniently bound by approximately radial lines laid from the axis to the circumference of the revolving structure. At the inner ends of these pockets are commonly and preferably frame-bars 21, and at the periphery of the said structure are the framebars 22, and the walls of the pockets or chambers are formed by screen-cloth, as 28, extending from one side of a frame part 22, around one of the frame-bars 21, and back to the nearest side of the adjacent frame-bar 22, as clearly indicated in the drawings. The course of the air-currents which pass through the machine is indicated by numerous small arrows on Fig. 2 of the drawings.

A shaft 25, arranged centrally within the dust-collector, serves to support the dust-dislodging structure. Said shaft in the construction shown is a double screw, and the body 26 of the traveling head embodies a reversingnut and is adapted to travel back and forth continuously along it. Extending out. radially from said traveling head toward the periphery of the revolving dust-collector is an arm 31, the point of which enters and in operation is guided by ways (shown as grooves) in the inner faces of the frame-bars 22. As will be seen upon an inspection of Figs. 1 and 7, the arrangement is such that the traveling head 26 will carry the arm 31 to justbeyond the end of the pocket or dust chamber (or as is sometimes called section) upon which it is operating at each end of its travel, and, as is especiallyshown in Fig. 7, the adjacent faces of the walls of the ways in the frame-bars 22 are cut away at the extreme ends, so that as the structure reaches. itsextreme position the arm 31 is able to escape from the way in which it has traveled during the passage from end to end of the dustcol lector which it is just concluding and (being also beyond the end of the chamber or section) to swing over into and engage with the corresponding way in the next frame-bar 22, the nearest wall whereof is correspondingly cut away to receive it, as just stated. This shifting from one frame-bar to another occurs after the cleaner is clear of the pocket, at about the time the reversing device of the double-nut in the traveling head is operated, and when this has happened the dust-dislodging structure is immediately started on a journey (alongside the next chamber or section) back toward the opposite end, and when this is completed the operation just described is again repeated and the dust-discharging mechanism shifted along to the next section of the dust-collector, and so on continuously as long as the machine is in operation. The dust-collector body as a whole is given a continuous slow rotary motion by a suitable driving mechanism, and this mechanismand the mechanism by which the traveling head is operated are so geared together that the dustcollector will advance just the distance allotted to one of its chambers or sections while the traveling head is making a single journey from one end to the other of the machine. As a result the dust-dislodging devices are carried somewhat to one side of a perpendicular position during each passage across the machine, and therefore the natural tendency of the arm 31 (by reason of its gravity) is to swing to the next dust-collector section each time it reaches the end of a journey, as described, and this is aided by the friction of the revolving shaft. In order, however, to make this movement more certain, I provide an auxiliary weight 32, which is carried by a horizontal arm 33, extending out from the traveling head, (or from a point below it on the arm 31,) the tendency of which is to force said arm 31 in the direction indicated. The weight 32 is adjustable on the arm' 33, so that the force can be nicely adjusted as required. I have shown as the means of effecting this adjustment a screw-threaded engagement between the arm and the weight.

Extending up from the head 26 is a standard 41, terminating in a head 42. To this head one or more whippers (I have shown and prefer to use four) are secured. These whippers in detail, as I prefer to construct them, consist of rigid arms 43, having or terminating in flexible whipping-fingers 44, which extend down close to but not in contact with the screen or sieve cloth 23, forming the walls of the dust-collecting pockets or chambers. These whipping or dust-dislodging fingers should be duplicated, so as to operate upon both sides or walls of the chambers or sections of the dustcollector, and I prefer to make them of wood having considerable resiliency,such as hickory or ash. That part of each of these fingers which is meant to form the spring or yielding portion is quite thin, while the extreme outer portion, which is meant (as it flies in) to come in contact with. the cloth, is thicker and has a face arranged or formed to lie parallel to the cloth walls, and thus equal contact throughout the entire length of the striking-surface is provided for. As above stated, the whipping- ,fingers are not in contact with the chamberwallsthat is, they will not normally bear against said walls when at rest. The flexibility of said whippers, however, enables them as they fly inwardly (under the force of their springs) to strike the-chamberwalls sudden sharp blows, which serve to dislodge the dust; but they immediately recede from contact therewith, so that there is no wearing-friction as the dust-dislodging device as a whole travels through the machine. These whipping-fingers are rigidly attached to the arms 43, which arms are preferably formed of metal and are secured by pivots to the head 42, as before stated. They are held inwardly toward the standard 41 by means of rods 45, which are secured to said standard and pass out through openings in said arms and carry springs 46 on their ends. These springs may be adjusted to a greater or less tension, as desired, by means of the adjusting-nuts 47 To the inner faces of these arms 43 at points opposite the shaft 25 I secure suitable contact-plates 48. These might be formed integrally with the arms; but as they are the parts which receive the greatest amount of wear I prefer to make them separate and removable (as shown) and secure them in place by suitable means, as cap-screws 49. A suitable cam or cams 51 (according to the number of arms and whippers employed) are secured to the shaft 25 and revolve therewith. These cams coming in contact with the plates 45 operate to force the arms outwardly and when the cams have passed the springs 46 force them inwardly, thus causing the whippers to deliver the blows. Buffers 52 limit the inward movement, and this limit is rendered adjustable by the adjusting-screws 53.

At each end of the structure, just outside the dust-collector chambers or pockets, are blocks 61 of substantially the shape and size of the ends of said chambers or pockets and which are suspended, by means of hangers 62, preferably from the shaft 25. Rods 63 and 64 extend from one of these hangers to the other and pass through suitable orifices formed for the purpose in the downwardly-extending portion of the traveling head 26. The hangers 62 are mounted loosely on their bearings, and therefore the blocks, except for their connection to the head 26, might sway at will in the spaces occupied thereby. The parts are so arranged, however, that when the traveling head 26 approaches the endof the machine it will, through the rods 63 and 64, guide the block which it is approaching into exact registry with the end of the chamber or pocket being operated upon, so that as the head 26.

traveling head carries the whipping-fingers past the end of said chamber or pocket they will have something to strike against and hold them in position till they start back (over the next pocket or chamber) on their return journey. Without some provision of this character the whipping-fingers might, as the dust-dislodging structure passes from that section of the dust-collector on which it has been operating into registry with the next section or pocket, strike or swing down past said end and would be apt to catch behind the ends of said pockets or sections, and this, if permitted, would obviously result in damage either to the sections or to the fingers.

In order to prevent the arm 31 from rebounding as it swings into the way or groove alongside the dust-collector section or pocket with which it is to next operate, I provide suitable spring-catches 65, the free ends of which project up into the path of said arm 31, but which are sufficiently flexible and yielding so that said arm 31 will force them down and pass over and be secured thereby, as will be readily understood. This prevents the blocks 61 from swinging back out of registry and insures the accuracy of the operation just described.

While it is necessary for the cams to revolve with the shaft, it is also necessary for them to travel alongside said shaft with the A longitudinal groove is therefore cut in the shaft, and a spline s is fixed in the cam and slides therein, which accomplishes this result, as is clearly indicated in Fig. 5. The body 26 of the traveling head is in the form of a yoke or housing inclosing the cam or cams and of course does not revolve with the shaft, but travels thereon. It contains a shifting internal projection 27, which engages with the threads of the screw-shaft, as is common in reversing-nuts adapted to travel on such double screw-shafts as are used in this machine.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is

l. The combination, with a dust-collector embodying a multiplicity of chambers for receiving the dust-laden air, of a central shaft, dust-dislodging devices carried by said shaft and adapted to travel back and forth (between the chambers.) frame members arranged in the outer portion of the dust-collector and having guiding-ways with which an arm on the traveling dust-dislodging structure will engage, the adjacent walls of said ways being cut away at the ends, thus permitting said arm to swing from one to the other at the end of the journey, whereby the dust-disloc ging devices are enabled to act upon the several chambers in succession.

2. The combination, with a dust-collector embodying a multiplicity of chambers for receiving the dust-laden air arranged radially about a central shaft, of a dust-dislodging device mounted upon and adapted to travel longitudinally of said shaft, means whereby said dust-dislodging device is shifted from one section to another at the ends of its respective journeys to and fro, and means whereby the dust-collector is caused to revolve a distance substantially equal to the distance allotted to each chamber synchronously with the time of each journey of the dust-dislodging devices.

3. The combination, with a dust-collector, of a dust-dislodging device composed of a double-threaded screw -shaft, a traveling head mounted thereon and adapted to travel back and forth from end to end thereof, a cam also mounted on said shaft to revolve therewith and also adapted to travel longitudinally thereof, and whippers mounted on said traveling head and adapted to be actuated by said cam to strike the chamber-walls of the dust-collector. 4. The combination, with a dust-collector, of a dust-dislodging device comprising a shaft, a traveling head mounted on said shaft and adapted to be moved thereon past the charm bers of the dust-collector, a cam carried and adapted to be revolved by said shaft and alsoadapted to travel longitudinally thereof with said traveling head, and whippers carried by said traveling head and operated by said cam to strike the chamber-walls of the dust-collector.

5. The combination, with a dust-collector, of a dust-dislodging device comprising a shaft, a housing-shaped traveling head mounted on said shaft, means for causing said head to travel longitudinally of said shaft, a cam contained within the housing of the traveling head and carried longitudinally of the shaft thereby, a spline whereby said cam is engaged by and caused to revolve with said shaft, and whippers mounted on said traveling head and operated by said cam to strike the chamberwalls of the dust-collector.

6. The combination, with a dust-collector, of dust-dislodging device comprising a shaft,

a traveling head mounted on said shaft, means for propelling said head longitudinallyof the shaft, a cam mounted upon and revolved by the shaft and moved longitudinally thereof by &

eling head and operating on said whippers in the reverse direction, and buffers for limiting the inward movement of the whippers.

8. The combination, with a dust-collector,

of dust-dislodging device comprising a shaft,

a traveling head mounted on said shaft, means for propelling said head longitudinally of the shaft, a cam mounted upon and revolved by the shaft and moved longitudinally thereof by the traveling head, whippers mounted on said traveling head and operated in one direction by the cam, springs also carried by said traveling head and operating on said whippers in the reverse direction, and adjustable bufiers for limiting the inward movement of the whippers.

9. The combination, with a dust-collector embodying a multiplicity of chambers for receiving the dust-laden air arranged radially to a shaft, of a dust-dislodging device mounted on the same axis as the said dust-collector and comprising a traveling head, means for propelling said traveling head longitudinally of its shaft back and forth, whippers secured on both sides of said traveling head and extendin g down on both sides of the individual chamber being operated upon, and means for operating said whippers and thus dislodging the dust from both walls of the chamber at the same operation.

10. The combination, in a dustcollector, with the chambers thereof, of a shaft, a traveling head thereon, and intermittingly-operated Whipping-fingers carried by said head and adapted to operate upon the walls of the chambers.

11. The combination, in a continuously-rotating dust-collector, of the chambers thereof, dust-dislodging devices adapted to advance with the chamber structure during operation and to operate upon the walls of said chambers, and means for automatically shifting the dustdislodging structure from section to section of the dust-collector during operation.

12. The combination, in a dust-collector, of the chambers thereof, a traveling dust-dislodging device adapted to operate upon the walls of said chambers and to pass successively from one chamber to another at the ends thereof, guiding-ways for guiding the path of said dust-dislodging device alongside each of said pockets or chambers, and blocks arranged at the ends of the said chambers or sections of substantially the same form in cross-section and adapted to receive said dust-dislodging device as the same passes therefrom, and guides operated by the dust-dislodging device for holding said blocks into registry with the section with which it is at the time operating.

13. The combination, in a dust-collector, of a central shaft, a traveling head mounted thereon and adapted to travel from end to end of the machine, a dust dislodging device mounted on said traveling head, blocks arranged at the ends of the chambers or sections of the dust-collector and suspended from said shaft, and means controlled by the traveling head whereby said blocks are guided into registry with said chambers or sections at the time the dust-dislodging device approaches them.

14. The combination in a dust-collector, of a rotary structure containing chambers, a central shaft therein about which said sections or chambers are radially disposed, a dust-dislodging device carried upon said central shaft, a guide-arm extending out therefrom, a guideway arranged alongside each dust-collector section, the adjacent faces of the guidewaywalls being cut awayat the ends thus enabling said arm to swing from one to the other, and spring-catches for holding said guide -arm from rebounding when it has completed its swinging movement.

In witness whereof I have hereunto set my hand and seal, at Toledo, Ohio, this 1st day of April, A. D. 1903.

ALLEN O. BRANTINGHAM. 

